1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * Copyright (c) 1994 John S. Dyson 7 * All rights reserved. 8 * Copyright (c) 2003 Peter Wemm 9 * All rights reserved. 10 * 11 * This code is derived from software contributed to Berkeley by 12 * William Jolitz. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91 43 */ 44 45 #ifdef __i386__ 46 #include <i386/vmparam.h> 47 #else /* !__i386__ */ 48 49 #ifndef _MACHINE_VMPARAM_H_ 50 #define _MACHINE_VMPARAM_H_ 1 51 52 /* 53 * Machine dependent constants for AMD64. 54 */ 55 56 /* 57 * Virtual memory related constants, all in bytes 58 */ 59 #define MAXTSIZ (32768UL*1024*1024) /* max text size */ 60 #ifndef DFLDSIZ 61 #define DFLDSIZ (32768UL*1024*1024) /* initial data size limit */ 62 #endif 63 #ifndef MAXDSIZ 64 #define MAXDSIZ (32768UL*1024*1024) /* max data size */ 65 #endif 66 #ifndef DFLSSIZ 67 #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */ 68 #endif 69 #ifndef MAXSSIZ 70 #define MAXSSIZ (512UL*1024*1024) /* max stack size */ 71 #endif 72 #ifndef SGROWSIZ 73 #define SGROWSIZ (128UL*1024) /* amount to grow stack */ 74 #endif 75 76 /* 77 * We provide a machine specific single page allocator through the use 78 * of the direct mapped segment. This uses 2MB pages for reduced 79 * TLB pressure. 80 */ 81 #if !defined(KASAN) && !defined(KMSAN) 82 #define UMA_MD_SMALL_ALLOC 83 #endif 84 85 /* 86 * The physical address space is densely populated. 87 */ 88 #define VM_PHYSSEG_DENSE 89 90 /* 91 * The number of PHYSSEG entries must be one greater than the number 92 * of phys_avail entries because the phys_avail entry that spans the 93 * largest physical address that is accessible by ISA DMA is split 94 * into two PHYSSEG entries. 95 */ 96 #define VM_PHYSSEG_MAX 63 97 98 /* 99 * Create two free page pools: VM_FREEPOOL_DEFAULT is the default pool 100 * from which physical pages are allocated and VM_FREEPOOL_DIRECT is 101 * the pool from which physical pages for page tables and small UMA 102 * objects are allocated. 103 */ 104 #define VM_NFREEPOOL 2 105 #define VM_FREEPOOL_DEFAULT 0 106 #define VM_FREEPOOL_DIRECT 1 107 108 /* 109 * Create up to three free page lists: VM_FREELIST_DMA32 is for physical pages 110 * that have physical addresses below 4G but are not accessible by ISA DMA, 111 * and VM_FREELIST_ISADMA is for physical pages that are accessible by ISA 112 * DMA. 113 */ 114 #define VM_NFREELIST 3 115 #define VM_FREELIST_DEFAULT 0 116 #define VM_FREELIST_DMA32 1 117 #define VM_FREELIST_LOWMEM 2 118 119 #define VM_LOWMEM_BOUNDARY (16 << 20) /* 16MB ISA DMA limit */ 120 121 /* 122 * Create the DMA32 free list only if the number of physical pages above 123 * physical address 4G is at least 16M, which amounts to 64GB of physical 124 * memory. 125 */ 126 #define VM_DMA32_NPAGES_THRESHOLD 16777216 127 128 /* 129 * An allocation size of 16MB is supported in order to optimize the 130 * use of the direct map by UMA. Specifically, a cache line contains 131 * at most 8 PDEs, collectively mapping 16MB of physical memory. By 132 * reducing the number of distinct 16MB "pages" that are used by UMA, 133 * the physical memory allocator reduces the likelihood of both 2MB 134 * page TLB misses and cache misses caused by 2MB page TLB misses. 135 */ 136 #define VM_NFREEORDER 13 137 138 /* 139 * Enable superpage reservations: 1 level. 140 */ 141 #ifndef VM_NRESERVLEVEL 142 #define VM_NRESERVLEVEL 1 143 #endif 144 145 /* 146 * Level 0 reservations consist of 512 pages. 147 */ 148 #ifndef VM_LEVEL_0_ORDER 149 #define VM_LEVEL_0_ORDER 9 150 #endif 151 152 #ifdef SMP 153 #define PA_LOCK_COUNT 256 154 #endif 155 156 /* 157 * Kernel physical load address for non-UEFI boot and for legacy UEFI loader. 158 * Newer UEFI loader loads kernel anywhere below 4G, with memory allocated 159 * by boot services. 160 * Needs to be aligned at 2MB superpage boundary. 161 */ 162 #ifndef KERNLOAD 163 #define KERNLOAD 0x200000 164 #endif 165 166 /* 167 * Virtual addresses of things. Derived from the page directory and 168 * page table indexes from pmap.h for precision. 169 * 170 * 0x0000000000000000 - 0x00007fffffffffff user map 171 * 0x0000800000000000 - 0xffff7fffffffffff does not exist (hole) 172 * 0xffff800000000000 - 0xffff804020100fff recursive page table (512GB slot) 173 * 0xffff804020100fff - 0xffff807fffffffff unused 174 * 0xffff808000000000 - 0xffff847fffffffff large map (can be tuned up) 175 * 0xffff848000000000 - 0xfffff77fffffffff unused (large map extends there) 176 * 0xfffff60000000000 - 0xfffff7ffffffffff 2TB KMSAN origin map, optional 177 * 0xfffff78000000000 - 0xfffff7bfffffffff 512GB KASAN shadow map, optional 178 * 0xfffff80000000000 - 0xfffffbffffffffff 4TB direct map 179 * 0xfffffc0000000000 - 0xfffffdffffffffff 2TB KMSAN shadow map, optional 180 * 0xfffffe0000000000 - 0xffffffffffffffff 2TB kernel map 181 * 182 * Within the kernel map: 183 * 184 * 0xfffffe0000000000 vm_page_array 185 * 0xffffffff80000000 KERNBASE 186 */ 187 188 #define VM_MIN_KERNEL_ADDRESS KV4ADDR(KPML4BASE, 0, 0, 0) 189 #define VM_MAX_KERNEL_ADDRESS KV4ADDR(KPML4BASE + NKPML4E - 1, \ 190 NPDPEPG-1, NPDEPG-1, NPTEPG-1) 191 192 #define DMAP_MIN_ADDRESS KV4ADDR(DMPML4I, 0, 0, 0) 193 #define DMAP_MAX_ADDRESS KV4ADDR(DMPML4I + NDMPML4E, 0, 0, 0) 194 195 #define KASAN_MIN_ADDRESS KV4ADDR(KASANPML4I, 0, 0, 0) 196 #define KASAN_MAX_ADDRESS KV4ADDR(KASANPML4I + NKASANPML4E, 0, 0, 0) 197 198 #define KMSAN_SHAD_MIN_ADDRESS KV4ADDR(KMSANSHADPML4I, 0, 0, 0) 199 #define KMSAN_SHAD_MAX_ADDRESS KV4ADDR(KMSANSHADPML4I + NKMSANSHADPML4E, \ 200 0, 0, 0) 201 202 #define KMSAN_ORIG_MIN_ADDRESS KV4ADDR(KMSANORIGPML4I, 0, 0, 0) 203 #define KMSAN_ORIG_MAX_ADDRESS KV4ADDR(KMSANORIGPML4I + NKMSANORIGPML4E, \ 204 0, 0, 0) 205 206 #define LARGEMAP_MIN_ADDRESS KV4ADDR(LMSPML4I, 0, 0, 0) 207 #define LARGEMAP_MAX_ADDRESS KV4ADDR(LMEPML4I + 1, 0, 0, 0) 208 209 /* 210 * Formally kernel mapping starts at KERNBASE, but kernel linker 211 * script leaves first PDE reserved. For legacy BIOS boot, kernel is 212 * loaded at KERNLOAD = 2M, and initial kernel page table maps 213 * physical memory from zero to KERNend starting at KERNBASE. 214 * 215 * KERNSTART is where the first actual kernel page is mapped, after 216 * the compatibility mapping. 217 */ 218 #define KERNBASE KV4ADDR(KPML4I, KPDPI, 0, 0) 219 #define KERNSTART (KERNBASE + NBPDR) 220 221 #define UPT_MAX_ADDRESS KV4ADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I) 222 #define UPT_MIN_ADDRESS KV4ADDR(PML4PML4I, 0, 0, 0) 223 224 #define VM_MAXUSER_ADDRESS_LA57 UVADDR(NUPML5E, 0, 0, 0, 0) 225 #define VM_MAXUSER_ADDRESS_LA48 UVADDR(0, NUP4ML4E, 0, 0, 0) 226 #define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS_LA57 227 228 #define SHAREDPAGE_LA57 (VM_MAXUSER_ADDRESS_LA57 - PAGE_SIZE) 229 #define SHAREDPAGE_LA48 (VM_MAXUSER_ADDRESS_LA48 - PAGE_SIZE) 230 #define USRSTACK_LA57 SHAREDPAGE_LA57 231 #define USRSTACK_LA48 SHAREDPAGE_LA48 232 #define USRSTACK USRSTACK_LA48 233 #define PS_STRINGS_LA57 (USRSTACK_LA57 - sizeof(struct ps_strings)) 234 #define PS_STRINGS_LA48 (USRSTACK_LA48 - sizeof(struct ps_strings)) 235 236 #define VM_MAX_ADDRESS UPT_MAX_ADDRESS 237 #define VM_MIN_ADDRESS (0) 238 239 /* 240 * XXX Allowing dmaplimit == 0 is a temporary workaround for vt(4) efifb's 241 * early use of PHYS_TO_DMAP before the mapping is actually setup. This works 242 * because the result is not actually accessed until later, but the early 243 * vt fb startup needs to be reworked. 244 */ 245 #define PHYS_IN_DMAP(pa) (dmaplimit == 0 || (pa) < dmaplimit) 246 #define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \ 247 (va) < (DMAP_MIN_ADDRESS + dmaplimit)) 248 249 #define PMAP_HAS_DMAP 1 250 #define PHYS_TO_DMAP(x) ({ \ 251 KASSERT(PHYS_IN_DMAP(x), \ 252 ("physical address %#jx not covered by the DMAP", \ 253 (uintmax_t)x)); \ 254 (x) | DMAP_MIN_ADDRESS; }) 255 256 #define DMAP_TO_PHYS(x) ({ \ 257 KASSERT(VIRT_IN_DMAP(x), \ 258 ("virtual address %#jx not covered by the DMAP", \ 259 (uintmax_t)x)); \ 260 (x) & ~DMAP_MIN_ADDRESS; }) 261 262 /* 263 * amd64 maps the page array into KVA so that it can be more easily 264 * allocated on the correct memory domains. 265 */ 266 #define PMAP_HAS_PAGE_ARRAY 1 267 268 /* 269 * How many physical pages per kmem arena virtual page. 270 */ 271 #ifndef VM_KMEM_SIZE_SCALE 272 #define VM_KMEM_SIZE_SCALE (1) 273 #endif 274 275 /* 276 * Optional ceiling (in bytes) on the size of the kmem arena: 60% of the 277 * kernel map. 278 */ 279 #ifndef VM_KMEM_SIZE_MAX 280 #define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \ 281 VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5) 282 #endif 283 284 /* initial pagein size of beginning of executable file */ 285 #ifndef VM_INITIAL_PAGEIN 286 #define VM_INITIAL_PAGEIN 16 287 #endif 288 289 #define ZERO_REGION_SIZE (2 * 1024 * 1024) /* 2MB */ 290 291 /* 292 * The pmap can create non-transparent large page mappings. 293 */ 294 #define PMAP_HAS_LARGEPAGES 1 295 296 /* 297 * Need a page dump array for minidump. 298 */ 299 #define MINIDUMP_PAGE_TRACKING 1 300 301 #endif /* _MACHINE_VMPARAM_H_ */ 302 303 #endif /* __i386__ */ 304